Born in 2006, Ryuko's mother died in childbirth, and her father Isshin Matoi was distant from Ryuko growing up. As Ryuko became an elementry student at Ox Elementry, she eventually lived there due to her father studying more than caring for his daughter. Ryuko would become a delinquent, getting into fights and eventually joining a gang. Six months before enrolling to the totalitarianist and brutal Honnōji Academy, Ryuko recieved a message from her father to see him, but when she arrived to his home, he was found bleeding to death with a red Scissor Blade stabbing him. Isshin told Ryuko that she had a choice to either live a peaceful life or fight and avenge his death by taking the blade, and Ryuko took the blade. However, Ryuko believed she saw a woman run off with the other half of the blade, and dashed after her, only to not be able to catch the supposed killer and have a bomb explode and burn her father and his ……